Meiosis

Meiosis is similar to mitosis, but differs in that the diploid cell involved undergoes a reductive cell division, resulting in the formation of haploid daughter cells. In addition, this process is broken into two divisions, meiosis I and meiosis II. Meiosis I begins with prophase I, when a cell’s DNA condenses into chromosomes. The centrioles migrate to opposite poles of the cell during late prophase I, forming the spindle apparatus. By metaphase I, the nuclear membrane has disappeared and the homologous chromosomes pair off, aligning along a single central plane. Anaphase I commences as the chromosome pairs separate and move to opposite poles of the cell. Two daughter cells form during telophase I, each containing one chromosome from each pair of homologs. Meiosis II then begins. During prophase II, the centrioles once again migrate to opposite poles of the cell to form a spindle. Metaphase II occurs as the chromosomes align along the center of each cell, and anaphase II commences with the migration of sister chromatids towards opposite poles. Finally, four haploid gametes are formed as cytokinesis occurs during telophase II.

Question 1: Centrioles _______ during late prophase I of meiosis I.
  1. stop moving
  2. divide in half
  3. recombine together
  4. migrate to opposite poles


Answer 1

Answer - (d) migrate to opposite poles

Question 2: In telophase II of meiosis, how many haploid gametes are formed?
  1. 1
  2. 2
  3. 3
  4. 4


Answer 2

Answer - (d) 4